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NATIONAL HARBOR, MD - FEBRUARY 22:  Former U.S. Ambassador to the United Nations John Bolton speaks during CPAC 2018 February 22, 2018 in National Harbor, Maryland. The American Conservative Union hosted its annual Conservative Political Action Conference to discuss conservative agenda.  (Photo by Alex Wong/Getty Images)
NATIONAL HARBOR, MD - FEBRUARY 22:  Former U.S. Ambassador to the United Nations John Bolton speaks during CPAC 2018 February 22, 2018 in National Harbor, Maryland. The American Conservative Union hosted its annual Conservative Political Action Conference to discuss conservative agenda.  (Photo by Alex Wong/Getty Images)

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Bolton: My past comments are behind me

National security adviser H.R. McMaster has resigned and will be replaced by former US ambassador and Fox News analyst John Bolton, President Donald Trump announced in a tweet.

Bolton: My past comments are behind me

National security adviser H.R. McMaster has resigned and will be replaced by former US ambassador and Fox News analyst John Bolton, President Donald Trump announced in a tweet.